/** * This is your typical header comment */int foo(int bar){   int idx;   int res = 0;      // trailing comment                     // that spans two lines   for (idx = 1; idx < bar; idx++)      /* comment in virtual braces */      res += idx;   res *= idx;        // some comment   // almost continued, but a NL in between// col1 comment in level 1   return(res);}// col1 comment in level 0